Every model below is published with verified specs. Savings calculated from EIA average energy prices.
Quick verdict
Lowest annual bill
A. O. Smith HPTS-50-2
$143/yr
Most efficient
Bradford White RE2HP50-1NCTT
UEF 3.89
Shortest unit
Bradford White RE2HP50-1NCTT
46.1" tall
What a typical electric tank unit costs to operate
Annual$607/yr
10-year projection$6,070
Based on Rheem PROE50 T2 RH95 (UEF 0.93). U.S. average energy rates (EIA).
Replacement options
A. O. Smith HPTS-50-2
Heat PumpUEF 3.80 / ~$143/yr / 10-yr tank warranty
Annual savings$464/yr
10-year savings$4,640
Install changes
- Needs condensate drain
- 30A breaker (electric tanks typically use 25A)
Bradford White RE2HP50-1NCTT
Heat PumpUEF 3.89 / ~$144/yr / 10-yr tank warranty
Annual savings$463/yr
10-year savings$4,630
Navien NWP500S050AUMB
Heat PumpUEF 3.85 / ~$145/yr / 10-yr tank warranty
Annual savings$462/yr
10-year savings$4,620
Install changes
- Needs condensate drain
- 30A breaker (electric tanks typically use 25A)
Rheem PROPH50 T2 RH400-30
Heat PumpUEF 3.88 / ~$146/yr / 10-yr tank warranty
Annual savings$461/yr
10-year savings$4,610
Install changes
- Needs condensate drain
- 30A breaker (electric tanks typically use 25A)
Rinnai REHP50BM
Heat PumpUEF 3.75 / ~$146/yr / 10-yr tank warranty
Annual savings$461/yr
10-year savings$4,610
Install changes
- Needs condensate drain
- 30A breaker (electric tanks typically use 25A)
A. O. Smith HPTA-50-2
Heat PumpUEF 3.68 / ~$152/yr / 10-yr tank warranty
Annual savings$455/yr
10-year savings$4,550
Install changes
- 30A breaker (electric tanks typically use 25A)
Noritz NHP50
Heat PumpUEF 3.46 / ~$162/yr / 10-yr tank warranty
Annual savings$445/yr
10-year savings$4,450
Install changes
- 30A breaker (electric tanks typically use 25A)
Bradford White RE2H50S
Heat PumpUEF 3.44 / ~$163/yr / 10-yr tank warranty
Annual savings$444/yr
10-year savings$4,440
Install changes
- 30A breaker (electric tanks typically use 25A)
Side-by-side comparison
| Spec | HPTS-50-2 | RE2HP50-1NCTT | NWP500S050AUMB | PROPH50 T2 RH400-30 | REHP50BM | HPTA-50-2 | NHP50 | RE2H50S |
|---|---|---|---|---|---|---|---|---|
| UEF | 3.80 | 3.89 | 3.85 | 3.88 | 3.75 | 3.68 | 3.46 | 3.44 |
| Annual Cost | $143/yr | $144/yr | $145/yr | $146/yr | $146/yr | $152/yr | $162/yr | $163/yr |
| Annual Savings | $464/yr | $463/yr | $462/yr | $461/yr | $461/yr | $455/yr | $445/yr | $444/yr |
| Height | 63" | 46.1" | 63" | 61.8" | 66.4" | 63.0" | 58.3" | 59.2" |
| Capacity | 46 gal | 45 gal | 44 gal | 45 gal | 46 gal | 46 gal | 47 gal | 45 gal |
| Warranty | 10 yr | 10 yr | 10 yr | 10 yr | 10 yr | 10 yr | 10 yr | 10 yr |
● Best value in each row.
Install considerations: electric tank to heat pump
Items your installer may need. Actual requirements depend on your existing setup, local code, and jurisdiction.
The federal tax credit of up to $2,000 under IRA Section 25C expired December 31, 2025. State and utility rebates may still apply.
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Sources. ENERGY STAR, manufacturer spec sheets, EIA average energy prices.Methodology